ADAU1461
Rev. 0 | Page 3 of 88
SPECIFICATIONS
Supply voltage (AVDD) = 3.3 V, TA = 25°C, master clock = 12.288 MHz (48 kHz fS, 256 × fS mode), input sample rate = 48 kHz, measurement
bandwidth = 20 Hz to 20 kHz, word width = 24 bits, CLOAD (digital output) = 20 pF, ILOAD (digital output) = 2 mA, VIH = 2 V, VIL = 0.8 V,
unless otherwise noted. Performance of all channels is identical, exclusive of the interchannel gain mismatch and interchannel phase
deviation specifications.
ANALOG PERFORMANCE SPECIFICATIONS, TA = 25°C
IOVDD = 3.3 V ± 10%.
Table 1.
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
ANALOG-TO-DIGITAL CONVERTERS
ADC performance excludes mixers
and PGA
ADC Resolution
All ADCs
24
Bits
Digital Attenuation Step
0.375
dB
Digital Attenuation Range
95
dB
INPUT RESISTANCE
Single-Ended Line Input
12 dB gain
80.4
kΩ
0 dB gain
21
kΩ
6 dB gain
10.5
kΩ
PGA Inverting Inputs
12 dB gain
84.5
kΩ
0 dB gain
53
kΩ
35.25 dB gain
1.7
kΩ
PGA Noninverting Inputs
All gains
105
kΩ
SINGLE-ENDED LINE INPUT
Full-Scale Input Voltage (0 dB)
1.0 (2.83)
V rms (V p-p)
Dynamic Range
20 Hz to 20 kHz, 60 dB input
With A-Weighted Filter (RMS)
83.5
99
dB
No Filter (RMS)
83
96
dB
Total Harmonic Distortion + Noise
1 dBFS
90
71
dB
Signal-to-Noise Ratio
With A-Weighted Filter (RMS)
99
dB
No Filter (RMS)
96
dB
Input Mixer Gain per Step
12 dB to +6 dB range
2.89
3
3.07
dB
Mute Attenuation
LINPG[2:0], LINNG[2:0] = 000,
RINPG[2:0], RINNG[2:0] = 000,
MX1AUXG[2:0], MX2AUXG[2:0] = 000
85.5
77
dB
Interchannel Gain Mismatch
0.3
+0.032
+0.3
dB
Offset Error
5
0
+5
mV
Gain Error
17
12
8
%
Interchannel Isolation
68
dB
Power Supply Rejection Ratio
CM capacitor = 20 μF, 100 mV p-p @ 1 kHz
67
dB
PSEUDO-DIFFERENTIAL PGA INPUT
Full-Scale Input Voltage (0 dB)
1.0 (2.83)
V rms (V p-p)
Dynamic Range
20 Hz to 20 kHz, 60 dB input
With A-Weighted Filter (RMS)
94
98
dB
No Filter (RMS)
91
95
dB
Total Harmonic Distortion + Noise
1 dBFS
89
83
dB
Signal-to-Noise Ratio
With A-Weighted Filter (RMS)
98
dB
No Filter (RMS)
95
dB
PGA Boost Gain Error
20 dB gain setting (RDBOOST[1:0],
LDBOOST[1:0] = 10)
8
+0.4
+8
dB